Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend ... more

Photo: Cody Duty, Houston Chronicle

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Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend ... more

Photo: Cody Duty, Houston Chronicle

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Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital.

Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County

Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County ... more

Photo: Cody Duty, Houston Chronicle

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Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital.

Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend ... more

Photo: Cody Duty, Houston Chronicle

Image 8 of 20

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend ... more

Photo: Cody Duty, Houston Chronicle

Image 9 of 20

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend ... more

Photo: Cody Duty, Houston Chronicle

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Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Authorities investigate the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend ... more

Photo: Cody Duty, Houston Chronicle

Image 12 of 20

Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County home. Deputies said they believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old. The children were flown by LifeFlight medical helicopter to Memorial Hermann hospital. less

Mourners react at the scene of a fatal shooting in the 4800 block of Russett Lane, Monday, May 5, 2014, in Sugar Land. A man and woman were fatally shot and two children were injured at the Fort Bend County ... more

Photo: Cody Duty, Houston Chronicle

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Authorities respond to a shooting Monday morning in Fort Bend County.

Authorities respond to a shooting Monday morning in Fort Bend County.

Photo: Cody Duty/Houston Chronicle

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Authorities respond to a fatal shooting at a Fort Bend County residence Monday morning.

Authorities respond to a fatal shooting at a Fort Bend County residence Monday morning.

Photo: Cody Duty/Houston Chronicle

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Authorities believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old.

Authorities believe the man and woman were the parents of the injured children, an 11-year-old boy and a girl who is about 15 years old.

Photo: Cody Duty / Houston Chronicle

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An unidentified man and woman console one another at the scene of a shooting in Fort Bend County Monday morning.

An unidentified man and woman console one another at the scene of a shooting in Fort Bend County Monday morning.

Photo: Cody Duty/Houston Chronicle

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Authorities respond to a shooting Monday morning in Fort Bend County.

Authorities respond to a shooting Monday morning in Fort Bend County.

Photo: Cody Duty/Houston Chronicle

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Authorities respond to a shooting Monday morning in Fort Bend County.

Authorities respond to a shooting Monday morning in Fort Bend County.

Photo: Cody Duty/Houston Chronicle

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Parents slain, two children hurt as gunfire erupts

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A shooting inside a home in the Sugar Land area on Monday left a couple dead and sent their children to the hospital with gunshot wounds.

Fort Bend County sheriff's officials said they don't know who pulled the trigger about 6 a.m. inside the home in the 4800 block of Russett Lane near Southborough.

"But we have ruled out any outside intruders," said sheriff's spokesman Bob Haenel.

Authorities said there were no signs of forced entry into the two-story red brick home in the New Territory area, southwest of Sugar Land.

The couple's children, an 11-year-old boy and his 15-year-old sister, were flown by LifeFlight helicopter to Memorial Hermann Hospital, where they were listed in stable condition later Monday, authorities said.